Inferior rectal artery
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{{Infobox Artery |
Name = {{PAGENAME}} |
Latin = arteria rectalis inferior, arteria hæmorrhoidalis inferior |
GraySubject = 155 |
GrayPage = 619 |
Image = Gray542.png |
Caption = The inferior rectal arteries(unlabeled) surround the anus. |
Image2 = Gray1083.png |
Caption2 = The bloodvessels of the [[rectum]] and [[anus]], showing the distribution and anastomosis on the posterior surface near the termination of the gut. (Labeled as hemorrhoidal artery.) |
BranchFrom = [[internal pudendal artery]] |
BranchTo = |
Vein = [[Inferior rectal veins]] |
Supplies = [[anal canal]] |
MeshName = |
MeshNumber = |
DorlandsPre = a_61 |
DorlandsSuf = 12155662 |
}}
The '''inferior rectal artery''' ('''inferior hemorrhoidal artery''') is an [[artery]] that supplies blood to the lower half of the [[anal canal]].
==Structure==
The inferior rectal artery arises from the [[internal pudendal artery]] as it passes above the [[ischial tuberosity]].
Piercing the wall of the [[pudendal canal]], it divides into two or three branches which cross the [[ischioanal fossa]], and are distributed to the muscles and integument of the [[anus|anal]] region, and send offshoots around the lower edge of the [[gluteus maximus]] to the skin of the [[buttock]].
They anastomose with the corresponding vessels of the opposite side, with the [[superior rectal artery|superior]] and [[middle rectal artery|middle rectal arteries]], and with the [[perineal artery]].
==See also==
* [[Superior rectal artery]]
* [[Middle rectal artery]]
* [[Inferior rectal nerve]]
==Additional images==
<gallery>
Image:Gray405.png|The perineum. The integument and superficial layer of superficial fascia reflected.
</gallery>
==External links==
* {{SUNYAnatomyFigs|41|04|05}} - "Inferior view of female perineum, branches of the internal pudendal artery."
* {{SUNYAnatomyFigs|42|03|05}} - "Branches of internal pudendal artery in the male perineum."
* {{SUNYAnatomyImage|9|0|77}}
* {{SUNYAnatomyImage|9|0|85}}
* {{NormanAnatomy|perineum}} ({{NormanAnatomyFig|analtriangle3}})
* {{DartmouthHumanAnatomy|figures/chapter_32/32-2.HTM}}
* {{DartmouthHumanAnatomy|figures/chapter_32/32-3.HTM}}
{{Gray's}}
{{circulatory-stub}}
{{Arteries of thorax and abdomen}}
[[ur:زیریں مستقیمی شریان]]